1. Reading in the snow: Sun Kang can't read at night, because she has no money to buy lamp oil, so she can only go to bed early. He felt it a pity to let time pass in vain. One night in the middle of the night, he woke up from his sleep, turned his head out of the window and found a ray of light in the window. It turned out to be a reflection of heavy snow, which can be used for reading. So he was so tired that he immediately got dressed, took out his book and went outside. The snow reflected on the wide earth is much brighter than the snow in the room. Sun Kang ignored the cold and immediately read a book. His hands and feet were frozen stiff, so he got up and ran, rubbing his fingers at the same time. From then on, every snowy night, he never missed this good opportunity and studied tirelessly. This spirit of hard work has promoted his knowledge to advance by leaps and bounds and become a knowledgeable person.

2. Zu Ti in Jin Dynasty was an open-minded and ambitious person. But he was a naughty boy when he was a child and didn't like reading. When he entered his youth, he realized his lack of knowledge and felt that he could not serve his country without studying, so he began to study hard. He read widely and studied history carefully, from which he learned a wealth of knowledge and made great progress. He has been in and out of Luoyang, Kyoto for many times, and people who have contacted him say that Zu Ti is a talented person who can assist the emperor in governing the country. When Zu Ti was 24 years old, he was recommended to be an official, but he didn't agree. He still studies tirelessly.

Later, Zu Ti and his childhood friend Liu Kunyi became the main book of Sizhou. He and Liu Kun have deep feelings. They not only share the same bed, but also have a common lofty ideal: to make contributions, revitalize the state of Jin and become a pillar of the country.

Once, in the middle of the night, Zu Ti heard the cock crow in his sleep. He kicked Liu Kun awake and said to him, "Everyone else thinks it's unlucky to hear a rooster crow in the middle of the night. I don't think so. How about we get up and practice swords when we hear chickens crow in the future? " Liu Kun readily agreed. So every day after the rooster crows, he gets up to practice his sword, and the light of the sword flies and the sound of the sword is sonorous. Spring goes to winter, cold goes to summer, and it never stops. Many things happen. After long and arduous study and training, they finally became generalists who can write good articles and lead troops to win the battle. Zu Ti was named General Zhenxi, realizing his desire to serve the country. Liu Kun, a corps commander in the north, was in charge of the military affairs of Bing, Hebei and Youzhou, and also gave full play to his literary talent and military talents.